[PATCH] Fix init warning in tsc2101 alsa driver

Fix init warning in tsc2101 alsa driver. WARNING:
sound/arm/omap/snd-omap-alsa-tsc2101.o - Section mismatch: reference to
.init.text: from .data between '' (at offset 0x6c) and
'tsc2101_snd_omap_alsa_capture'

Signed-off-by: Mika Laitio <lamikr@cc.jyu.fi>
Signed-off-by: Tony Lindgren <tony@atomide.com>